stylelint-config-drupal/test/whitespace-indentation.css

Drupal stylelint configuration

/**
 * @file
 * Whitespace indentation test.
 *
 * @see https://www.drupal.org/docs/develop/standards/css/css-formatting-guidelines#s-indentation
 */
@media print {
  /* This line is indented with 2 spaces, 2 spaces x 1 level of indentation. */
  .example {
    /* This line is indented with 4 spaces, 2 spaces x 2 levels of indentation. */
    padding: 0;
  }
}